问题
选择题
Sleep is important, and ______trouble having a good night’s rest can be very annoying.
A．having
B．have
C．had
D．have had
答案
答案：A
题目分析：考查动名词做主语：句意：睡觉很重要，睡个好觉有困难是让人恼火的。And后面的句子中can be annoying是谓语，前面是主语，用动名词做主语，选A。